Estimating PS&E – Plans, specifications and estimate 1.
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Transcript of Estimating PS&E – Plans, specifications and estimate 1.
Estimating Estimating
PS&E – Plans, specifications and estimate
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Types of Estimates Types of Estimates
Ball-Park (Planning phase)
Preliminary (Design Report/EIS)
Detailed (PS&E---Detailed Design)
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Estimate QualityEstimate Quality
Good book-keepingAccurate backup of quantitiesFamiliarity w/ projectExperience
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Estimating ProcedureEstimating Procedure
List all item numbers-plans and similar plans
Estimate quantities and prepare a backup for each item #
Assign prices to each item (WAIPR) Lump sum price analysis Summary of quantities Add contingency Summarize final costs
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Item NumbersItem NumbersReferenced to spec bookExamples:
◦201.07 Clearing and Grubbing◦203.xxxx Grade and Reshape
Ditches◦304.xx Subbase◦610.0203 Establish Turf◦634.01 Survey and Stakeout
*Special specifications—General or Special (must be approved)
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UnitsUnitsUnit abbreviations
Definition
LS Lump Sum
EA Each
CY Cubic Yard
SY Square Yard
LF Linear Feet
TN Ton
MO Month
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Units-MetricUnits-MetricUnit abbreviations
Definition
CM Cubic Meters
SQM Square meters
MT Metric Ton
KG Kilograms
M Meters
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SpecificationsSpecificationshttps://www.dot.ny.gov/main/
business-center/engineering/specifications
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Pay Item CatalogPay Item Catalog
https://www.dot.ny.gov/pic
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Weighted Average Item Price Weighted Average Item Price Report (WAIPR)Report (WAIPR)
https://www.dot.ny.gov/divisions/engineering/design/dqab/waipr
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Special Spec RepositorySpecial Spec Repository
https://www.dot.ny.gov/spec-repository-us/
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ContingencyContingencyAdded to estimate to account for
unknowns Usually a percentage of final cost
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Cost Estimate ExampleCost Estimate ExampleItem # Description Unit QTY Price Subtotal
201.0601 Clear & Grub LS 1.0 $12,500.00
$12,500.00
203.0100 Earth Cut & Emb
CY 14,545.0
$12.00 $174,540.00
10209.0100
Bale Dikes LF 42.0 $7.50 $315.00
403.1100 Asph Base Course
TN 6392.0 $38.00 $242,896.00
603.7303 24” RCP End Sec
EA 4.0 $700.00 $2,800.00
637.0701 Office MO 6 $1,000.00
$6,000.00
645.2140 Traffic Sign EA 8 $170.00 $1,360.00
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Backup for Estimate ExampleBackup for Estimate ExampleITEM 640.0102 (White Paint Reflective Paint ITEM 640.0102 (White Paint Reflective Paint Stripes)Stripes)2 Shoulder StripesSta 26+44 to Sta 30+922*448’ = 896’Say 900’
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Asphalt – English TonsAsphalt – English Tons.06865 Tons per Cubic Foot (Base).07525 Tons per Cubic Foot (Binder).07265 Tons per Cubic Foot (Top-
6F)
Old Marshall Design
New Superpave?????
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Lump Sum Price AnalysisLump Sum Price AnalysisEstimate for items paid as a “Lump
Sum”
Includes:◦ Labor◦ Materials◦ Equipment◦ Rental costs◦ Profit and Overhead
Typical lump sum items:◦ Clearing and Grubbing◦ Survey and Stakeout◦ Temporary Traffic Signals
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Lump Sum Analysis ExampleLump Sum Analysis ExampleItem 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)Signal) Labor Costs
◦ Backhoe Operator-$30.05/hr
◦ Electrician-$32.99/hr
◦ Laborer-$22.95/hr
Prevailing Wages http://wpp.labor.state.ny.us/wpp/publicViewPWChanges.do?method=showIt
Installation and Removal of Temp. Poles◦ 1 Backhoe Operator $30.05/hr * 16 hours =
◦ 2 Laborers @ $22.95/hr * 16 hours =
Installation and Removal of Temp. Signal Heads◦ 1 Electrician @ $32.99/hr * 16 hours =
◦ 2 Laborer@ $22.95/hr * 16 hours =
Installation and Removal of Controller◦ 1 Electrician @ $32.99 * 16 hours =
◦ 1 Laborer @ $22.95 * 16 hours =
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Lump Sum Analysis Lump Sum Analysis Example-Cont.Example-Cont.Item 619.13 (Temporary Traffic Item 619.13 (Temporary Traffic Signal)Signal) Materials
◦ Temporary Poles 4 @ $1,300.00 each
◦ Temporary Signal Heads 4 @ $250.00 each
◦ Controller, Fixed Time 1@ $1,000.00
◦ Misc. Hardwire and Wire $1,000.00
Equipment (Installation and Removal)
◦ 1 Bucket Truck @ $18.00/hr * 24 hours
◦ 1 Backhoe @ $35.00/hr * 24 hours
Profit and Overhead (20%)
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Estimate SharesEstimate Shares
Highway BridgeUtilitiesDifferent Counties
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Engineer’s EstimateEngineer’s Estimate
Quantities included in plans
Engineer’s estimate not given to contractor
Prices not available to contractor—each contractor provides their own bid
Lowest bidder gets the contract21
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